Wall-climbing device



, C. HENNEKING. WALL CLIMBING DEVICE. APPLICATION man on. 30. I920.

Patented Aug. 29, 1922;

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CARL HENNEKING, OF MAGDEBURG, GERMANY.

WALL-CLIMBING DEVICE.

Specification of Letters Patent.

Patented Aug. 2'9, 1922.

Application filed October 30, 1920. Serial No. 420,805.

T 0 all whom it may concern:

Be it known that I, CARL HENNEKING, a citizen of the German State, residing at lilagdeburg, Kaiser-lVilhelm-Platz l, Germany, have invented certain new and useful Improvements in Tall-Climbing Devices, (for which I have filed an application in Germany, Feb. 19. 1914), of which the following is a specification.

The invention relates to an improved climbing device for the shafts of sewer canals and other building constructions. The invention consists essentially in making a building stone integral with a U-shaped front portion which serves as a foot-rest and handle for facilitating the descending and ascending of the wall of shafts and which consists of the same material, for instance stoneor earthenware, as the stone which is built into or fixed in the wall.

In the device for facilitating the climbing of walls according to this invention the U- shaped front portion which forms the projecting foot-rest and handle is made in one piece with a preferably hollow stone which is adapted to be built into the wall. The improved device or construction thus represents a foot-rest and handle which as compared with the already known contrivances is verysimply applied by being built into the wall like an ordinary brick and which has the further advantage that its portion which projects beyond the wall will not be damaged or destroyed by humidity, gases or acids like wall-climbing contrivances made of castor wrought-iron and fixed in the wall.

The climbing device constructed according to this invention is preferably made in a protruding-press from the materials usually employed in the manufacture of earthenware. It then issues from the nozzle of the press as a continuous strand which is cut into pieces of the required thickness. In this manner all the parts may be made of the same thickness and subjected to the same pressure so that a completely flawless internal structure of great and uniform strength is obtained.

In the accompanying drawing the im proved climbing device is illustrated by way of example.

Fig. 1 shows the device and the wallwork of the shaft in front-elevation,

Fig. 2 the same device in longitudinal section,

Fig. 3 is a slightly modified device in front-elevation,

Fig. t the same device in longitudinal section and Fig. 5 a plan of the device.

Likeparts are designated by the same ters of reference in all the figures. I

The rear portion a of the improvedclimbing device preferably consists of a hollow block comprising fourupright walls surrounding an opening which may be filled up with concrete, cement and the like, as required. By means of this rear or key portion the climbing device is fixed in the brick or concrete wall, as illustrated in the drawing. The measurements and the configuration of this climbing stone are preferletably so predetermined that they comply with the static requirements. With this end in View the device is constructed as a beam fixed at one end and which at the place 1) where it is inserted into the wall and where the strain is greatest has the largest crosssectional area, see Figs. 2 and 4. The portion 0 of the climbing stone which projects beyond the wall is preferably also hollow and may, as shown in Fig. 2, be rectangular in shape. On its face it is provided with corrugations d or similar means which give the foot a better rest and prevent it from slipping. In the inner face of the front wall 6 a longitudinal recess 7 may advantageously be formed which produces an overhanging ledge which offers a better hold to the fingers, see Fig. 2. The foot-rest and handle forming the projecting portion of the built-in device may also be shaped as shown in Fig. 4, in which case its lower part, which is statically useless, is cut away in a straight slanting line sloping towards the wall, whereby the front crossbar is so reduced in its dimensions that the remaining part 9 forms a convenient hand-rail or handle. Obviously this crossbar may also be provided with a recess, like the one shown at f in Fig. 2, on its inner face to ensure a still better grip for the hand. Although I have described and illustrated only two embodiments of the features of my invention,'it will be understood that I dc not limit myself to the same, as the details of the construction may be varied in many particulars without departing from the spirit or sacrificing any advantages of the invention. For instance the key stone may be made solid and the foot-rest may only be recessed on its face to provide a hold for the fingers. The manufacture may then be carried through in another manner than that described. The essence of the invention must be seen in the broad combination in a single piece of earthenwareas a stone or brick adapted to be fixed in a Wall with a projecting foot-rest and handle adapted to facilitate the climbing of the wall. The dimensions and proportions of the device may also be varied within wide limits.

hat I claim as my invention and desire to secure by Letters Patent is 2-- l. A wall-climbing device consisting of a building stone formed of stoneware and having a U-shaped front portion of rectangular cross-section integral therewith and adapted to project from the wall thereby to provide a foot rest and handle.

2, A wall-climbing device consisting of a hollow building stone formed of stoneware of rectangular cross-section, a bridging wall in the hollow part of the stone uniting the side-walls and dividing the whole stone into a part to be inserted into the built-up wall and another part to project from the builtup well and to form a foot rest and handle.

In testimony whereof I affix my signature in presence of two Witnesses.

CARL HENNEKING.

Witnesses RUDoLF RENNoRr, FRANZ BEYER. 

